Objective: The research is to study the relative specificity and the clinical effect of Diji point (SP8) to treat primary dysmenorrheal comparing with that of Ciliao (BL32).

• 目的：本研究通过针刺单穴地机与次髎治疗原发性痛经的疗效比较，来观察地机穴治疗原发性痛经的相对特异性，证明地机穴治疗原发性痛经的临床疗效。